MKMapView中天上戳下大头针的效果

MKPinAnnotationView的animatesDrop属性

有大头针没有动画，设置以下animatesDrop=YES

如果想自定义大头针想有动画，那需要参考下面代码自己写个动画

1. #pragma mark MKMapViewDelegate
2. - (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views
3. {
4.     MKAnnotationView *annotationView;
5.     for (annotationView in views)
6.     {
7.         if (![annotationView isKindOfClass:[MKPinAnnotationView class]])
8.         {
9.             CGRect endFrame = annotationView.frame;
10.             annotationView.frame = CGRectMake(endFrame.origin.x, endFrame.origin.y - 230.0, endFrame.size.width, endFrame.size.height);
11.             
12.             [UIView beginAnimati*****:@"drop" context:NULL];
13.             [UIView setAnimationDuration:0.45];
14.             [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
15.             [annotationView setFrame:endFrame];
16.             [UIView commitAnimati*****];
17.         }
18.     }
19. }

http://blog.youkuaiyun.com/tongzhitao/article/details/7819539